EP 3819709 B1 20230719 - IMAGE FORMING APPARATUS
Title (en)
IMAGE FORMING APPARATUS
Title (de)
BILDERZEUGUNGSVORRICHTUNG
Title (fr)
APPAREIL DE FORMATION D'IMAGES
Publication
Application
Priority
JP 2019204130 A 20191111
Abstract (en)
[origin: EP3819709A1] An image forming apparatus (100) includes a plurality of image forming portions (Pa to Pd), an intermediate transfer belt (8), a plurality of primary transfer members (6a to 6d), a belt cleaning device (19), a secondary transfer member (9), a voltage application device (74), an image density sensor (25), and a control section (90). The image forming apparatus (100) executes calibration in which, based on a result of detection by the image density sensor (25), an image forming condition is adjusted. The control section (90) is capable of executing a cleaning assist mode in which, at the time of executing the calibration, a part of patch images (M, C, Y, and K, m, c, y, and k) on the intermediate transfer belt (8) is transferred to the secondary transfer member (9). In a case of forming a toner image on the intermediate transfer belt (8) after the intermediate transfer belt (8) has revolved once, the control section (90) executes the cleaning assist mode, and in a case of not forming the toner image on the intermediate transfer belt (8) after the intermediate transfer belt (8) has revolved once, the control section (90) continuously applies a reverse transfer voltage to the secondary transfer member (9).
IPC 8 full level
G03G 15/00 (2006.01); G03G 15/16 (2006.01)
CPC (source: CN EP US)
G03G 15/1605 (2013.01 - CN); G03G 15/161 (2013.01 - CN EP US); G03G 15/5058 (2013.01 - EP); G03G 15/55 (2013.01 - EP); G03G 2215/1661 (2013.01 - EP)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
EP 3819709 A1 20210512; EP 3819709 B1 20230719; CN 112782951 A 20210511; CN 112782951 B 20240130; JP 2021076746 A 20210520; JP 7439464 B2 20240228; US 11169469 B2 20211109; US 2021141321 A1 20210513
DOCDB simple family (application)
EP 20206675 A 20201110; CN 202011222374 A 20201105; JP 2019204130 A 20191111; US 202017090749 A 20201105